Coke oven door



'Oct 4, 1938. wlLpUTTE 2,131,829

COKE OVEN DOOR Filed Jan. 9, 1935 2 Sheets-Sheet 1 ATTORN EY oct. 4,1938. L WILPUTTE 2,131,829

vCOKE OVEN DOOR v Filed Jan. 9, 1955 2 Sheets-Sheet 2 vll/ll lll/lll.

Bymww ATTORNEY Patented Oct. 4, 1938 PATENT OFFICE COKE OVEN DOOR LouisWilputte, New Rochelle, N. Y.

Application January s claims.

The general object of the present invention is to provide improvementsin door construction primarily devised and adapted for use in thesocalled plug doors employed to removably close the ends of horizontallyelongated coke ovens.

More specifically, the object of the invention is to provide an improveddoor of the known socalled self sealing type comprising rigid metallicouter door element or section, an inner refractory plug section of thedoor L, and a suitably flexible metallic sealing element or section. Inthe closed position of such a door, the plug section extends into andsubstantially fills an end portion of a i coking chamber, and thesealing member is in l5 sealing engagement with a metallic door framemember forming a rigid, though preferably removable, part of-the ovenstructure at the margin of the end of the corresponding coking chamber.

The present invention is characterized in particular by the form andconstruction of the sealing element or section of the door. In itspreferred form, the sealing element consists of a metal plate having asubstantially fiat body portion and an integral rim portion extendingtransversely away from the inner side of the body portion at the marginof the latter. In the closed position of the door, the body portion ofthe sealing member extends across the door opening and has the free edgeof itsrim portion in engagement with a sealing surface on the door framemember extending around the door opening. The integral rim portion ofthe improved sealing member replaces flanged bar doorframe engagingparts formed separately from, and attached :l5 to a sealing plate bodymember, heretofore used in doors of the type directly improved upon. Theelimination of lsuch separately formed iiange bar parts simplifies thedoor construction, reduces the amount of material required in itsconstruc- 40 tion, and substantially reduces its fabrication cost.

The present invention lis further characterized by novel connectionsbetween the rigid outer frame section of the door and the sealingplate45 employed to distort the latter as required to insure its propersealing engagement with the door frame member, which in use is distortedrelativeV to the rigid outer frame section of the door, by the thermaland mechanical stresses to which the 50 parts,v and particularly thedoor frame member, are subjected in use. My improved door includesclamping screws distributed along the margin of the sealing member, butmy improved construction differs from prior constructions including 55such screws, by its inclusions of provisions which s, 1935, serial No.977

(ci. 2oz-24s) I have devised for the easy and quick removal andreplacement of the clamping screws, to thereby facilitate the assemblyand disassembly of the door, and in particular, the removal of thesealing member for repairs or replacement.

In the preferred form of the present invention, each of said clampingscrews engages the sealing member through a suitably shaped lug or padpart welded to the outer side of the sealing member, `and engaging asmall portion only of that member, so that it does not interfere withthe general flexibility of the member, while providing all reinforcementneeded as a result of the action on the member of the correspondingclamping screw. f

My improved door, in its preferred form, is

\ also characterized by the novel manner in which the bricks orrefractory blocks forming the body portion `refractory plug section ofthe door, and the means for directly supporting and holding said bricksor blocks in place, are formed and arranged.

The various features of novelty which characterize my invention arepointed out with particularity in the claims annexed to and forming apart of this specification. For a better understanding of the invention,however, and the advantages possessed by it reference should be had tothe accompanying drawings and descriptive matter in which I haveillustrated and described a preferred embodiment of the invention.

Of the drawings:

Fig. 1 is a side elevation of a portion of a coke oven battery;

Fig. 2 is a vertical section on the line 2-2 of Fig. 1;

Fig. 3 is a section on the line 3 3 of Fig. 1;

Fig. 4 is a partial section on the line 4-4 of Fig. 3: Y

Fig. 5 is an elevation of a portion of the door as seen from its innerside;

Fig. 6 is an elevation of a blank from which the flexible sealingelement of the door may be formed; and Fig. '7 is a partial sectiontaken similarly to Fig. 3 illustrating a modification.

The coke oven illustrated in the drawings is one comprising horizontallyelongated coking chambers A and heating Walls B arranged side by side ina row in which the coking chambers alternate with the heating walls. Thecoke oven masonry is reenforced and supported at the sides of thebattery by a metallic armor, shown as comprising a flash plate Cat eachheating wall end, and a corresponding vertical buckstay D by which theflash plate is held in place. At each end of each coking chamber end isa door frame member E. The latter preferably, and as shown, is in theform of a one piece casting extending around the door opening, and ofsubstantial horizontal depth measured in the direction of the length ofthe heating walls and coking chambers, the heating walls being recessedat their vertical corners as indicated at B' to receive inner portionsof the corresponding door frame members E, each of which extends intothe oven structure and provides a metallic lining for the correspondingcoking chamber end.

As shown. each door frame member E is anchored in place by adjustableclamping connections between its sides and the adjacentv buckstaymembers D. The clamping connections shown comprise parts d Welded to thebuckstay members, and clamping levers F and bolts G. Each clamping leverF engages the corresponding door frame member E at one end, and at itsopposite end engages a corresponding part d, and is subjected to asuitable clamping force by means of the corresponding clamping bolt G,which acts between the lever F and the corresponding part d. In theconstruction shown, each door frame member E includes adjustable flangeportions e at its sides which abut against adjacent edge portions of theadjacent iiash plates C. The features of coke oven construction andarrangement illustrated in the drawings and hereinbefore described,include special features 0f construction and arrangement disclosed andclaimed in my prior application Ser. No. '732,023 led June 23, 1934,which forms no part of the invention disclosed and claimed herein, saidinvention being adapted for use in coke oven structures including noneof the special features of said prior application.

In the form illustrated in the drawings, each door comprises a rigidouter metallic frame section, which in the particular form shown,includes vertical channel bar members H at the opposite sides of thedoor, top, bottom, and one or more intermediate cross frame members H',and other cross frame members I-I"` and H3, the cross frame membersbeing welded at their ends to the side frame members H. 'Ihe cross framemembers H2 provide anchorages for the pivot pins I' on which are mounteddoor locking levers or latch bars I, which may be turned into and out ofengagement with the latch hook members II welded or otherwise suitablysecured to the corresponding door frame member E, to thereby lock thedoor to and unlock it from said door frame member. The cross framemember H3 is provided for engagement by an operating part of the usualdoor handling machine (not shown), employed to move the door into andout of its normal closed position in which the door extends into thedoorway.

'I'he intermediate flexible plate section or element of the door, in theform shown, comprises a one-piece part K of metal plate, which may be aquarter of an inch or so thick, and includes a substantially fiat bodyportion, which in the closed position of the door extends entirelyacross the door opening, and an integral inturned rim or flange portionK', at the margin of said body portion, which then engages the sealingsurface E' formed on the corresponding door frame member E. The member Kmay be formed from a flat blank shaped as shown in Fig. 6, by bendingthe marginal portions of the blank transversely of the plane of theblank, to form the transversely extending rim portion K'. The blankshown in Fig. 6 is so bent along the side and top and bottom lines K2and K3 shown in Fig. 6, and thereafter each top and bottom rim endportion K4 is welded to the corresponding end K5 of a side rim portionbrought into proximity therewith by the bending operation. In some casesthe rim may be formed in whole or in part of strip material welded tothe door plate, but in such cases the parts are preferably so weldedtogether as to give the sealing member substantially the same form andilexibility as the above described member formed from a one piece blank.

The plate member K is connected to and suspended from the outer framesection of the door at or adjacent the top of the door, by means shownas including a horizontal shaft L, passing through and supported at itsends-by heavy plate or lug parts welded to the base portions of thechannel bars H forming the side members of the rigid outer door framesection. The shaft L also passes through openings in brackets or lugs Kssecured to the upper portion of the plate K, said openings preferablybeing horizontally elongated as shown. 'I'he lugs K's are welded orotherwise secured to a horizontal channel bar K.'z secured to the plateK by bolts Ka which pass through the base portion of the channel bar K"and through the plate K and through a flange M' of a casting or otherheavy metal part M thereby secured to the plate K. The member M extendsinto the oven chamber when the door is in its closed position shown inFig. 2.

The means provided for distorting the sealing member K as required toinsure proper engagement of the sealing edge of its rim K' with thesealing surface E.y of the door frame member E, notwithstanding thedeformation of the latter which occurs in use, comprises a multiplicityof horizontal clamping screws N connecting the sealing member, atsuitably distributed points along its margin, to the rigid outer framesection of the door. As shown, each clamping screw has a head N receivedin an open ended recess O in a corresponding small pad or reinforcingpart O Welded to the outer side of the member K adjacent the margin ofthe body portion of the latter. An open ended slot O2 is formed in theouter wall of the recess O' to receive a reduced neck portion N2 of thescrew N. Longitudinal movement of the latter in either direction maythus produce a corresponding movement of the adjacent portion of thesealing member K.

The threaded outer portion of each screw N passes through acorresponding nut P, and through the adjacent flange of thecorresponding frame member H, or H', to which the nut P is detachablysecured by bolts P'. 'Ihe outer frame member ilanges are formed withopen ended slot H5 to receive the clamping screws N, so that when thecorresponding bolts P' are removed, each clamping screw N may be removedbodily by a lateral movement, without requiring the screw to beseparated from its nut P. In the normal condition of the apparatus, eachclamping screw N may be anchored in place by a lock nut N3 threaded ontothe screw, and acting on the corresponding outer frame member flangethrough a suitable washer N.

The bricks or refractory blocks Q, Q' and Q2, constituting the bodyportion of the plug section of the door, are stacked up on a rigidsupporting member R secured to the inner side of the body portion of themember K adjacent the lower end of the latter. As shown, the member Rcomn prises a horizontal portion R' on which the brick parts arestacked, and which, in the normal closed position of the door, restsupon the door sill portion e' of the door frame member E. The member Ralso comprises an uprising portion R2 adjacent the plate K anddetachably connected to the latter by bolts R2. Advantageously, also,the member-P includes gusset or side plate portions R4 at the oppositeside edges of the door between which the brick parts at the bottom ofthe stack are received. The brick supporting portion R of the member Ris formed at its upper side with a recessed seat R5 for a metallic postS. The latter extends to the top of the plug section of the door, andhas its upper end loosely received in a recess M2 formedfor the purposein the previously mentioned part M. In the preferred construction shown,the post S is of T bar cross section with thebase of the section at theside of the post remote from the sealing member K. 2

The brick parts Q, Q' and Q2 are suitably shaped to interlock with oneanother and with the post S which they collectively surround. As shown,one brick part Q and one brick part Q' are located at each of aplurality'of diierent levels and constitute the body portion of the plugsection brick work. One of the two parts Q and Q' at each level extendsfrom one side of the plug section of the door into overlapping relationwith the'post S and into abutting relation with the other part of thepair, which is also in overlapping relation with the post S. and extendsto the opposite side of the door. As shown, each of the parts Q and Qincludes a portion q at the outer side of the door extending intoproximity with the Web or leg of T bar section of the post S, andextending in front of the corresponding portion of the head of the postsection. Each br'ick part Q' includes a portion at the inner side of thepost extending past the latter.

The brick parts Q and Q are each recessed to receive a correspondingportion of a corresponding brick part Q2 by which the brick parts Q andQ' are locked in place about the post S. As shown. the bricks Q and Q'in each of two adjacent horizontal layers or courses, collectively forma horizontal channel extending from the inner side oi the door to theadjacent side of the post S, and shaped to receive and be filled by acorresponding brick part Q2. Each brick part Q2 is formed with iiangeportions or ribs extending horizontally in the direction of the dooraxis and projecting away from the top and bottom faces of the brick Q2at the side edges of the latter. Each brick Q2 is thus in effect a tenondovetail part interlocking with two brick parts Q and two brick partsQ', all of which are thereby held against signiiicant horizontalmovement relative to the post S. Since in the normal manipulation anduse of such doors the latter are maintained vertically or substantiallyso, it is not necessary to provide interlocking provisions preventinghorizontal movement of the locking brick parts Q2 away from the T bar S,between which and the inner face of the plug door section, each part Q2extends. Friction is suilcient to hold those parts in place, even thoughthe plug section brick lparts are not laid with mortar, which may or mayseat for the upper end of the post S might be formed by a recess in theAcasting h, but I consider it preferable to provide a special part M asshown, in which the upper end of the post has its seat. In the preferredconstruction illustrated, the top bricks Q and Q and a portion of theinterlocking brick Q2 are above the top of the post S, the

ness may advantageously be interposed between the post S and theadjacent brick surfaces in the initial assembly of the door. To insuresuiilcient flexibility and freedom for adjustment of the sealing memberpart K, the latter is suitably spaced away from the outer face of theplug section of the door, and to this end cardboard of suitablethickness may well be interposed between the plate K and the plugsection of the door in the initial assembly of the latter.

Formed as described, the plate member K includes no parts not necessaryfor the attainment of, or interfering with its intended functions, andis characterized by the simplicity of its construction and the inherentrelatively low cost of fabrication, as well as by the omission of partsinterfering with the desired exibility of the member. Aside from theproper location of a few bolt holes through it, the only precise oraccurate machining operation required for the production of the member Kis confined to the shaping of its sealing rim edge, which ordinarily is'chamfered as shown. The pads O are relatively inexpensive to constructand attach to the member K in the manner described, and provide thelatter with all of the local reinforcement needed when the member isbeing bent by the action of the screws N to bring the sealing rim edgein contact all along its length with the sealing surface on the doorframe member. While the padsO thus provide the neededv localreinforcement, they do not interfere slgnicantly with the `desirablegeneral exibility of the plate K.

In the modified door construction illustrated in Fig. 7, the verticalside members HA of the outer frame section of the door have smooth outerside faces H4 to accommodate the attachment thereto of members PA. 'I'helatter are employed in lieu of the nut members P of the constructionshown in Figs. 1 to 4. As shown, the members HA are channel bars withthe flanges of each member extending toward the other member. 'I'hedevices PA differ from the devices P primarily in that they are clampedagainst the outer side faces H4 of the members HA. l vEach part PAcomprises a body portion seating against the face of the correspondingmember HA and secured to the latter by one or more bolts P2 extendingthrough the body portion of the member PA and the base web of the'channel bar member HA. Each part PA also preferably includes a flange orprojection P3 which overhangs and abuts against the inner edge of themember HA. Each part PA is also formed with projection P4 extending awayfrom the door, and formed with threaded aperture to receive thecorresponding screw N. The latter has its head anchored in thecorresponding ilexible plate carried part 0.

As will be apparent, the members PA may be disconnected from the framesection of the door more readily than can the parts P of theconstruction first described. With the parts PA arranged as shown, theclamping bolts N may readily be adjusted by an ordinary socket wrench.'I'he fact that the frame members HA with their inturned flanges do notoverhang the bolts N and corresponding portions of the door, sealingmeans facilitates visual inspection of the sealing provisions, and thedetection of leakage conditions which make adjustment of the bolts Nnecessary. This is especially desirable with door frame members of thegeneral character shown in Fig. '7, which differ from the members E ofthe construction first described, in that they extend more deeply intothe oven masonry, and provide less clearance between the rim portion K1of the sealing member and the door frame portions alongside that rimportion. As those skilled in the art will understand, the door framemembers EA are of a type and form heretofore employed with clay iuteddoors.

The plug section of the coke oven door illustrated and described hereincomprises novel features not claimed herein, but claimed in my copendingapplication, Serial No. 156,453, filed July 30, 1937, as a division andcontinuation in part, of this application.

While in accordance with the provisions of the statutes, I haveillustrated and described the best forms of embodiment of my inventionnow known to me, it will be apparent to those skilled in the art thatchanges may be made in the form of the apparatus disclosed withoutdeparting from the spirit of my invention as set forth in the appendedclaims and that in some cases certain features of my invention may beused to advantage without a corresponding use of other features.

I claim:

1. In a self-sealing door, the combination with an inner plug sectionand an outer rigid frame section, of a flexible sealing plate section,reinforcing parts attached to the outer side of said sealing sectionadjacent and distributed along its margin and each formed with an openended undercut slot, an adjustable clamping connection between eachreinforcing part and said frame section comprising a clamping bolt hav.-ing its head received in the said slot, a nut through which the body ofthe bolt is threaded and means detachably securing said nut to saidframe section.

2. In a self-sealing doorl the combination with an inner plug sectionand an outer rigid frame section, of a flexible sealing plate section,reinforcing parts attached to the outer side of said sealing sectionadjacent, and distributed along its margin and each formed with an openended undercut slot, an adjustable clamping connection between each partand the outer door seetion comprising a clamping bolt having its headreceived in the said slot, a nut through which the body of the bolt isthreaded and means detachably connecting said nut to said frame section,the latter being formed with an open ended slot for the passage of eachof said clamping bolts to permit lateral movement of said bolt away fromsaid frame section when the corresponding nut is disconnected therefrom.

3. In a self-sealing furnace door, the combination of an inner plugsection, a rigid outer frame section comprising side members andintermediate flexible plate sealing parte extending lateraliy beyondsaid members at the sides of the door, and threaded clamping connectionsbetween said members and portions, each of said connections including apart bolted against the outer side/face of the corresponding member anda clamping bolt threaded into said part and detachable with the latterfrom said frame section.

4. In a self-sealing door, the combination with an inner plug sectionand an outer rigid frame section, of a flexible sealing plate section,reinforcing parts attached to the outer side of said sealing sectionadjacent and distributed along its margin and each formed with an openended undercut slot, an adjustable clamping connection between eachreinforcing part and said frame section comprising a clamping bolthaving its head received in the said slot, a nut through which the bodyof the bolt is threaded, and means detachably securing the clampingconnection nuts against outer side portions of said frame section.

5. In a self-sealing furnace door, the combination with an inner plugsection and a rigid outer frame section of a flexible sealing membercomprising a metallic plate-like body portion projecting laterallybeyond the lateral edge of said plug section and a rim portion extendingtransversely away from said body portion at the innerside of, andadjacent the marginal edge of said body portion and terminating in aninner sealing edge portion of reduced thickness, said rim and bodyportions having an integral connection extending continuously along themarginal edge of said body portion, and uniting to form a one piecesealing member -of substantially uniform thickness in all portionsthereof, except said sealing edge portion.

6. In a self-sealing furnace door. the combination with an inner plugsection and a rigid outer frame section, of a flexible sealing membercomprising a metallic plate-like body portion projecting laterallybeyond the lateral edge of said plug section and a rim portion extendingtransversely away from said body portion at the innerside of, andadjacent the marginal edge of said body portion, said body and rimportions being] unsevered portions of a one piece blank of sheet metalbent to dispose said portions transversely to one another.

7. In a self-sealing furnace door, the combination with an inner plugsection and a rigid outer frame section, of a flexible sealing membercomprising a metallic plate-like body portion projecting laterallybeyond the lateral edge of said plug section and a rim portion extendingtransversely away from said body portion at the innerside of, andadjacent the marginal edge of said body portion and terminating in aninner sealing edge, said rim and body portions being unsevered portionsof a sheet metal blank bent to dispose said portions transversely to oneanother, 'reinforcing parts welded to the outer side of said bodyportion at, and engaging the latter only at distributed points along itsmargin, and adjustable clamping connections between said parts and saidouter frame section.

8. In a self-sealing furnace door, the combination with an inner plugsection adapted to extend into the doorway, in a door frame having asealing surface at the margin of doorway and a rigid outer framesection, of a exible sealing member comprising a metallic plate-likebody structure of bent plate form and of substantially uniform thicknessin all portions thereof except said sealing edge portion, reinforcingparts welded to the outer side ci said body portion at, and engaging thelatter only at distributed points along its margin, and adjustableclamping connections between said parts and said outer frame section,said body portion being movable toward and away from said plug and framesections throughout the major portion of its extent. lo

LOUIS WILPUTTE.

